Cutter-bar.



AyB: GONNER.

CUTTER BAR. APPLIOA'TION 111111111 1111.17. 1912.

Patented Jn 7, 1913.

AMBER R. CNNER, OF MEBEJITH CENTER, NEW HAMPSHIRE.

GUTTER-BAR.'

Specification of Letters Patent.

Patented Jan. 7,1913.

Application led April 17, 1912. -Serial No. 691,380.

Toiall whom it may concern: i

Be it known that I, AMBER R. CORNER,

a citizen of Vthe United States, residing at Meredith Center, in the county of Belknap and State of New Hampshire, have invented certain new and useful Improvements in Cutter-Bars, of which the following isa specification.

My invention relates to cutter bars for mowers and reapers, and has A:for its object the provision of improved means for securing the cutting blades to the bar, to the end" that said blades may be quickly. re-

moved for replacing defective teeth, and

consists essentially. of threaded project-ions on the bar that are engaged by nuts that `holdthe teeth in engagement with the bar and'provide a locking device for holding the nuts fromunscrewing that issecurely fastened to the bar and teeth.

M invention-will be described in detail` hereinafter 'and illustrated in the accompanying drawings, in which,

Figure 1 is a top plan view of a bar constructed in accordance with my invention showing-the locking device in place; Fig. 2, asimilar view with the locking device removed; Fig. 3, a side view of the bar shown in elevation; Fig. 4, a longitudinal sectional view; and Fig. 5 is a cross section on the line 5-5 of- Fig. 1. In the drawings, similar reference characters will be used to designate corresponding parts throughout the several views.

Heretofore, in securing the cutting blades to the cutter bars of mowing machines, it has been the practice to rivet the blades to the bar, making it necessary to remove the rivets' when it is desired to replace a broken or defective tooth, and because of the inconvenience, has made this manner of fastening the cut-ter blades to the bar objectionable. In my invention, the cutting' blades are so secured to the bar that they may be quickly removed and replaced as desired, said substitution of new teeth for broken ones being made in the fields if necessary.

In the embodiment ot my invention as Shown in theydrawings. 1 indicates the bar lhaving pins 2 secured thereto and adapted to engage openings 3 in the cutter blades 4. 5 indicates threaded pins also secured to the bar and engaging notches in the edges of said blades 4. 6 indicates nuts mounted on said threaded pins 5 and engaging the upper faces of the blades 4 to hold them in e'n. gagement with the bar 1.

7 indicates a shoulder o-n the end'of` the bar 1 and having an opening 8 therein to a0.-

in the ordinary manner. y a i To prevent the nuts 6 from unscrewin I provide a plate 9 of flexible materiaLsuc receive the pitman for reciprocating the bar as steel, having elongated slots 10 therein bf that engage the sides of said nuts to hold them from rotation. One end of said plate' 9 is formed with a thickened portion 1 1 having elongated sockets in itsunderside' indicated at 12 to receive nuts 6 and its'end 70 formed with a' doveJt-ailprojection 13 hatv engages a dove-tail socket` 14 in the' shoulder 7.

15 indicates a plunger mounted in .the

horizontal openings 16 inthe shoulder 7 75 and having a spring 17 mounted therein that engages said plunger 15 to hold it normally projected from the openings 16 to en' gage the upper face of the dove-tail. pro

jection 13 and hold itfrom withdrawal 30 from the dove-tail groove 14 in theshoul-v der 7 i A 18 indicates slots formed as a continuation of slots 10 and having inclined sides 19 that engage inclined heads 20 on some of 85 the pins 2.

The end of the plate 9 isv formed with bii furcations as shown at 21 and the two sides of said plate at the end' are formed with downwardly extending angular projections 90 22 that engage notches 23 in the outer ends of the bar 1. l y

24 indicates a hook secured to theouter end of the bar 1 and projecting above its upper surface and adapted to engage the outermost of the cutter blades'4, and in v combination with the threaded pin 5 at the other end of said blade and the nut 6 mounted thereon holding said blade Ain en gagement with the cutter bar. The upper 10( portion of said hook 24 engages the slot 21 in the end of the plate 9 and acts as a guide; in placing said plate in position on the barb' It will be understood from this description and inspection .of the drawings that when .it is desired to remove one of the cut ting blades for anyv purpose, the plunger 15 is pushed back in the opening 16 against the resistance of springl?, thus permitting vthe end 11 of the plate 9 to be raised from en 110 gagement with the shoulder 7. Phe plate 9 may then be moved outwardly 1n the direction of the outer end 'of the bar 1 until the heads 2() of the pins 2 are released from engagement with the slots 18 and the plate 9 may then be raised from engagement with the blades. The nuts 6 may then be unscrewed from the pins and the blade removed from the bar for replacing a defective blade. In replacing the plate 9, the reverse Aof the operation above described is carried out, and when the dove-tail projection 13 is in engagement with the dove-tail slotl 1li, .in the shoulder 7 and the plunger .15 engages the upper surface ci the exten'- "sion 11, the device will be in an assembledv position.

`Having thus described lmy invention, what I claim is Y 1. In a cutter bar, a bar, threaded pins secured to said bar, cutter blades mounted on said? bar and having' notches to receive said pins, nuts mounted onsaid pins and resting on to of said blades, a plate engaging said bla es and having slots therein to engage said nuts and hold them from rotation, said plate also having slots therein v communicating with the 'rst mentioned slots and having inclined sides, pins secured ,l to the bar and having heads With inclined sidesvto engage the inclined sides of said vs lots, a shoulder on the end of the bar and formed with a socket, the end of said plate nuts mounted onsaid threaded pins, a plate having Slots engaging said nuts and other Slots with the first mentioned slots and having inclined sides, other pins having heads formed With inclined sides engaging said last mentioned slots, said plate being formed with a dove-tail projection on one end, a shoulder secured to the bar and having a dove-tail socket to receive said dove-tail projection, a `plunger slidably mounted in said shoulder and adapted to engage the upper surface of the plate andthe outerv end of the plate formed with hooks engaging the under side of the bar.

In testimony whereof I affix my signature in presence of two Witnesses.

. AMBER R. CONNER. Witnesses v iv N. M. CORLIss, BERTRAM BLAISDELL.

communicating 

